? and it is usually an absolutely not answer. jackie is hoping for a less violent future but there is lack of evidence that a gun buyback means of there will be fewer crimes committed. >> for every one begun in it means that we are seeing one potential for a death, murder. >> reporter: that is exactly why she is here. >> i do not want any threats or harm to come to my family at all. >> reporter: with that and a couple of hundred dollars in cash and not a bad morning the san mateo county sheriff collected nearly 700 guns today as part of the gun buy back program with more than 63-thousand dollars in cash handed out during the event. >> from san francisco to capitol hill. thousands of people took to the streets all across the nation today in support of president obama's gun control initiatives. chris mozingo introduces us to demonstrators in washington calling on congress to support the new proposal. >> we need to be heard. >> reporter: lori bennett is not accustomed to events like this. this is her first demonstration. >> "newtown just tore my heart out. honestly didn't feel this emotional since 9- 11.